Welcome to Welfow

About us

    Welflow is a combined company of four factories whose products are complementary to each other. In addition to the mainland China market, the products are exported to South Korea, Taiwan(China), the United States, Singapore, Malaysia, Australia, and other countries and regions.
  • 2018-07-12

Thread difference between BSPT, BSPP & NPT

Different thread sealing depending on the geographical region, size of the pressure system, and the environment. For example, In Asia, such as China, Korea, Japan, etc normally use BSPT; In U.S, Canada, etc always use NPT, then the BSPP thread is most popular in UK, Europe, Australia, New Zealand, and South Africa. While one sealing style is not inherently better than another each style has its application.

NPT Connections ( National Pipe Thread)- US & Canada

It is according to ANSI/ASME B1.20.1 Pipe Threads. 60 degrees of thread angle. NPT male adapters have a taper thread that wedges into the female NPT adapter.

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